Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 879 · 40 questions

Remember (Find the topic, use the idea): Find the topic: energy, safety, conductor, closed loop, switches, cells, symbols, series or parallel. Use that lesson’s idea — complete loop, all ON for series, cells add up, one path or many. For sums, write the working and check it again.

1. 1.🔋 Does a generator give electricity or use electricity? (a) gives electricity (b) uses electricity
2. 2.🔘 A bulb and a cell are joined through 2 switches on 2 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
3. 3.Which drawing is the symbol for a battery? (a) a line lifted at a gap (b) two or more cell symbols (c) a circle with M inside (d) one tall, one short bar
4. 4.True or false: to touch a fallen wire is safe. (a) True (b) False
5. 5.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) dust particles (c) water drops (d) electrons
6. 6.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
7. 7.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) to make it colourful (c) quick and clear for all (d) symbols are heavier
8. 8.Which of these uses electricity? (a) a wind turbine (b) a mobile phone (c) a solar panel (d) a generator
9. 9.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
10. 10.Which of these is safe? (a) use small battery cells (b) open a phone charger (c) poke things in a socket (d) use mains for a project
11. 11.What does a toggle switch do? (a) works only while pressed (b) slides side to side (c) stays where you flip it (d) closes when tipped over
12. 12.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
13. 13.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
14. 14.⚡ What does a table fan mainly change electricity into? (a) sound (b) movement (c) heat (d) light
15. 15.💡 5 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 2 and 4 are taken out of their holders. Does bulb 5 glow? (a) No (b) Yes
16. 16.True or false: if a wire is cut, the circuit is open and no current flows. (a) True (b) False
17. 17.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) never (c) when either is ON (d) only when both are ON
18. 18.Which of these is not safe? (a) stay away from pylons (b) stop if a part gets hot (c) keep drinks far away (d) use a cable with cuts
19. 19.⚡ What does a rice cooker mainly change electricity into? (a) sound (b) movement (c) heat (d) light
20. 20.🔋 2 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
21. 21.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) so all go off together (d) to save copper only
22. 22.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a short circuit (b) an open circuit (c) a safe circuit (d) a parallel circuit
23. 23.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
24. 24.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a fuse or MCB (c) a bulb (d) a long wire
25. 25.Which of these is safe? (a) stop if a part gets hot (b) climb an electric pole (c) touch a fallen wire (d) use mains for a project
26. 26.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 1.5 V (c) 12 V (d) 9 V
27. 27.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
28. 28.Which of these is a conductor? (a) a plastic straw (b) a rubber band (c) a paper strip (d) aluminium foil
29. 29.True or false: a circle with an X in it is the symbol for a bulb. (a) False (b) True
30. 30.Which of these uses electricity? (a) a cell (b) a generator (c) a wind turbine (d) an air conditioner
31. 31.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
32. 32.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) one single wire (d) a kind of bulb
33. 33.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 4 glow? (a) No (b) Yes
34. 34.🔘 Which kind of switch works only while pressed? (a) a slide switch (b) a toggle switch (c) a tilt switch (d) a push button
35. 35.🔋 Does a computer give electricity or use electricity? (a) uses electricity (b) gives electricity
36. 36.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
37. 37.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) it is just untidy (c) it spoils the paint (d) water makes it cold
38. 38.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) battery (b) diode (c) bulb (d) motor
39. 39.True or false: to use small battery cells is safe. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) a steel spoon (b) a graphite rod (c) a plastic ruler (d) a brass key

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